How do I find the player who clicked?

So I want it so when a player clicks a button it changes the color of a tool in his inventory. I can do that but how do I find the player who clicked? (clickdetector)

A quick check of the wiki turned up this. Basically, the MouseClick event knows the player that clicked it and we can use that.

--Script is assumed to be placed inside the Part the ClickDetector resides in.

function onClicked(player)
	print("Button clicked by " .. player.Name);
	--Insert code to adjust the player's tool

	--Edit: A demonstration of how to do stuff with the player's character, as shown by the example of adding Sparkles to the character's torso.
	local torso = player.Character:findFirstChild("Torso")
	if torso == nil then return end
	local spark = Instance.new("Sparkles")
	spark.SparkleColor = Color3.new(1, 0, 0)
	spark.Parent = torso
	wait(2)
	spark:Destroy()
end

script.Parent.ClickDetector.MouseClick:connect(onClicked)